I am going with your Catless version downpipe on my 535xi,
will catless version throw a CEL because of O2 sensor is reading different ## compares to the stock setting?
did you throw O2 spacer to fool the sensor its reading low ##?
after contacting Terry@Burgertuning, their BMS CAN tool is NOT compatible with our F10 N55..... which doesnt make sense why they are selling it to our F10 N55 owners in the first place..
